What you can do, however, is write a server agent that will scan for documents that meet your criteria and set a field value in those documents. The selection formula can use this field to decide whether to include them in the view. Or the agent can find these documents and put them into a folder. (Use the access properties of the folder to prevent users from manually adding and removing documents in the folder.)
I wrote an article for The View that explains how to create fancy views like this. If you're not a subscriber, you can still download the sample database.
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This was first published in August 2005